#!/usr/bin/env python
#
# Copyright (C) 2016 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import os
import json
import pytest
import aiohttp
import zipfile

from unittest.mock import patch
from unittest.mock import MagicMock
from tests.utils import AsyncioMagicMock, AsyncioBytesIO

from gns3server.controller.project import Project
from gns3server.controller.export_project import export_project, _filter_files


@pytest.fixture
def project(controller):
    p = Project(controller=controller, name="test")
    p.dump = MagicMock()
    return p


@pytest.fixture
def node(controller, project, async_run):
    compute = MagicMock()
    compute.id = "local"

    response = MagicMock()
    response.json = {"console": 2048}
    compute.post = AsyncioMagicMock(return_value=response)

    node = async_run(project.add_node(compute, "test", None, node_type="vpcs", properties={"startup_config": "test.cfg"}))
    return node


def test_filter_files():
    assert not _filter_files("hello/world")
    assert _filter_files("project-files/tmp")
    assert _filter_files("project-files/test_log.txt")
    assert _filter_files("project-files/test.log")
    assert _filter_files("test/snapshots")
    assert _filter_files("test/project-files/snapshots")
    assert _filter_files("test/project-files/snapshots/test.gns3p")


def test_export(tmpdir, project, async_run):
    path = project.path
    os.makedirs(os.path.join(path, "vm-1", "dynamips"))

    os.makedirs(str(tmpdir / "IOS"))
    with open(str(tmpdir / "IOS" / "test.image"), "w+") as f:
        f.write("AAA")

    # The .gns3 should be renamed project.gns3 in order to simplify import
    with open(os.path.join(path, "test.gns3"), 'w+') as f:
        data = {
            "topology": {
                "computes": [
                    {
                        "compute_id": "6b7149c8-7d6e-4ca0-ab6b-daa8ab567be0",
                        "host": "127.0.0.1",
                        "name": "Remote 1",
                        "port": 8001,
                        "protocol": "http"
                    }
                ],
                "nodes": [
                    {
                        "compute_id": "6b7149c8-7d6e-4ca0-ab6b-daa8ab567be0",
                        "node_type": "dynamips",
                        "properties": {
                            "image": "test.image"
                        }
                    }
                ]
            }
        }
        json.dump(data, f)

    with open(os.path.join(path, "vm-1", "dynamips", "test"), 'w+') as f:
        f.write("HELLO")
    with open(os.path.join(path, "vm-1", "dynamips", "test_log.txt"), 'w+') as f:
        f.write("LOG")
    os.makedirs(os.path.join(path, "project-files", "snapshots"))
    with open(os.path.join(path, "project-files", "snapshots", "test"), 'w+') as f:
        f.write("WORLD")

    with patch("gns3server.compute.Dynamips.get_images_directory", return_value=str(tmpdir / "IOS"),):
        z = async_run(export_project(project, str(tmpdir), include_images=False))

    with open(str(tmpdir / 'zipfile.zip'), 'wb') as f:
        for data in z:
            f.write(data)

    with zipfile.ZipFile(str(tmpdir / 'zipfile.zip')) as myzip:
        with myzip.open("vm-1/dynamips/test") as myfile:
            content = myfile.read()
            assert content == b"HELLO"

        assert 'test.gns3' not in myzip.namelist()
        assert 'project.gns3' in myzip.namelist()
        assert 'project-files/snapshots/test' not in myzip.namelist()
        assert 'vm-1/dynamips/test_log.txt' not in myzip.namelist()

        assert 'images/IOS/test.image' not in myzip.namelist()

        with myzip.open("project.gns3") as myfile:
            topo = json.loads(myfile.read().decode())["topology"]
            assert topo["nodes"][0]["compute_id"] == "local"  # All node should have compute_id local after export
            assert topo["computes"] == []


def test_export_vm(tmpdir, project, async_run, controller):
    """
    If data is on a remote server export it locally before
    sending it in the archive.
    """

    compute = MagicMock()
    compute.id = "vm"
    compute.list_files = AsyncioMagicMock(return_value=[{"path": "vm-1/dynamips/test"}])

    # Fake file that will be download from the vm
    mock_response = AsyncioMagicMock()
    mock_response.content = AsyncioBytesIO()
    async_run(mock_response.content.write(b"HELLO"))
    mock_response.content.seek(0)
    compute.download_file = AsyncioMagicMock(return_value=mock_response)

    project._project_created_on_compute.add(compute)

    path = project.path
    os.makedirs(os.path.join(path, "vm-1", "dynamips"))

    # The .gns3 should be renamed project.gns3 in order to simplify import
    with open(os.path.join(path, "test.gns3"), 'w+') as f:
        f.write("{}")

    z = async_run(export_project(project, str(tmpdir)))
    assert compute.list_files.called

    with open(str(tmpdir / 'zipfile.zip'), 'wb') as f:
        for data in z:
            f.write(data)

    with zipfile.ZipFile(str(tmpdir / 'zipfile.zip')) as myzip:
        with myzip.open("vm-1/dynamips/test") as myfile:
            content = myfile.read()
            assert content == b"HELLO"


def test_export_disallow_running(tmpdir, project, node, async_run):
    """
    Dissallow export when a node is running
    """

    path = project.path

    topology = {
        "topology": {
            "nodes": [
                    {
                        "node_type": "dynamips"
                    }
            ]
        }
    }

    with open(os.path.join(path, "test.gns3"), 'w+') as f:
        json.dump(topology, f)

    node._status = "started"
    with pytest.raises(aiohttp.web.HTTPConflict):
        async_run(export_project(project, str(tmpdir)))


def test_export_disallow_some_type(tmpdir, project, async_run):
    """
    Dissalow export for some node type
    """

    path = project.path

    topology = {
        "topology": {
            "nodes": [
                {
                    "node_type": "cloud"
                }
            ]
        }
    }

    with open(os.path.join(path, "test.gns3"), 'w+') as f:
        json.dump(topology, f)

    with pytest.raises(aiohttp.web.HTTPConflict):
        z = async_run(export_project(project, str(tmpdir)))
    z = async_run(export_project(project, str(tmpdir), allow_all_nodes=True))

    # VirtualBox is always disallowed
    topology = {
        "topology": {
            "nodes": [
                {
                    "node_type": "virtualbox",
                    "properties": {
                        "linked_clone": True
                    }
                }
            ]
        }
    }
    with open(os.path.join(path, "test.gns3"), 'w+') as f:
        json.dump(topology, f)
    with pytest.raises(aiohttp.web.HTTPConflict):
        z = async_run(export_project(project, str(tmpdir), allow_all_nodes=True))


def test_export_fix_path(tmpdir, project, async_run):
    """
    Fix absolute image path, except for Docker
    """

    path = project.path

    topology = {
        "topology": {
            "nodes": [
                {
                    "properties": {
                        "image": "/tmp/c3725-adventerprisek9-mz.124-25d.image"
                    },
                    "node_type": "dynamips"
                },
                {
                    "properties": {
                        "image": "gns3/webterm:lastest"
                    },
                    "node_type": "docker"
                }
            ]
        }
    }

    with open(os.path.join(path, "test.gns3"), 'w+') as f:
        json.dump(topology, f)

    z = async_run(export_project(project, str(tmpdir)))
    with open(str(tmpdir / 'zipfile.zip'), 'wb') as f:
        for data in z:
            f.write(data)

    with zipfile.ZipFile(str(tmpdir / 'zipfile.zip')) as myzip:
        with myzip.open("project.gns3") as myfile:
            content = myfile.read().decode()
            topology = json.loads(content)
    assert topology["topology"]["nodes"][0]["properties"]["image"] == "c3725-adventerprisek9-mz.124-25d.image"
    assert topology["topology"]["nodes"][1]["properties"]["image"] == "gns3/webterm:lastest"


def test_export_with_images(tmpdir, project, async_run):
    """
    Fix absolute image path
    """
    path = project.path

    os.makedirs(str(tmpdir / "IOS"))
    with open(str(tmpdir / "IOS" / "test.image"), "w+") as f:
        f.write("AAA")

    topology = {
        "topology": {
            "nodes": [
                    {
                        "properties": {
                            "image": "test.image"
                        },
                        "node_type": "dynamips"
                    }
            ]
        }
    }

    with open(os.path.join(path, "test.gns3"), 'w+') as f:
        json.dump(topology, f)

    with patch("gns3server.compute.Dynamips.get_images_directory", return_value=str(tmpdir / "IOS"),):
        z = async_run(export_project(project, str(tmpdir), include_images=True))
        with open(str(tmpdir / 'zipfile.zip'), 'wb') as f:
            for data in z:
                f.write(data)

    with zipfile.ZipFile(str(tmpdir / 'zipfile.zip')) as myzip:
        myzip.getinfo("images/IOS/test.image")


def test_export_keep_compute_id(tmpdir, project, async_run):
    """
    If we want to restore the same computes we could ask to keep them
    in the file
    """

    with open(os.path.join(project.path, "test.gns3"), 'w+') as f:
        data = {
            "topology": {
                "computes": [
                    {
                        "compute_id": "6b7149c8-7d6e-4ca0-ab6b-daa8ab567be0",
                        "host": "127.0.0.1",
                        "name": "Remote 1",
                        "port": 8001,
                        "protocol": "http"
                    }
                ],
                "nodes": [
                    {
                        "compute_id": "6b7149c8-7d6e-4ca0-ab6b-daa8ab567be0",
                        "node_type": "vpcs"
                    }
                ]
            }
        }
        json.dump(data, f)

    z = async_run(export_project(project, str(tmpdir), keep_compute_id=True))

    with open(str(tmpdir / 'zipfile.zip'), 'wb') as f:
        for data in z:
            f.write(data)

    with zipfile.ZipFile(str(tmpdir / 'zipfile.zip')) as myzip:
        with myzip.open("project.gns3") as myfile:
            topo = json.loads(myfile.read().decode())["topology"]
            assert topo["nodes"][0]["compute_id"] == "6b7149c8-7d6e-4ca0-ab6b-daa8ab567be0"
            assert len(topo["computes"]) == 1

def test_export_images_from_vm(tmpdir, project, async_run, controller):
    """
    If data is on a remote server export it locally before
    sending it in the archive.
    """

    compute = MagicMock()
    compute.id = "vm"
    compute.list_files = AsyncioMagicMock(return_value=[
        {"path": "vm-1/dynamips/test"}
    ])

    # Fake file that will be download from the vm
    mock_response = AsyncioMagicMock()
    mock_response.content = AsyncioBytesIO()
    async_run(mock_response.content.write(b"HELLO"))
    mock_response.content.seek(0)
    mock_response.status = 200
    compute.download_file = AsyncioMagicMock(return_value=mock_response)

    mock_response = AsyncioMagicMock()
    mock_response.content = AsyncioBytesIO()
    async_run(mock_response.content.write(b"IMAGE"))
    mock_response.content.seek(0)
    mock_response.status = 200
    compute.download_image = AsyncioMagicMock(return_value=mock_response)

    project._project_created_on_compute.add(compute)

    path = project.path
    os.makedirs(os.path.join(path, "vm-1", "dynamips"))

    topology = {
        "topology": {
            "nodes": [
                    {
                        "compute_id": "vm",
                        "properties": {
                            "image": "test.image"
                        },
                        "node_type": "dynamips"
                    }
            ]
        }
    }

    # The .gns3 should be renamed project.gns3 in order to simplify import
    with open(os.path.join(path, "test.gns3"), 'w+') as f:
        f.write(json.dumps(topology))

    z = async_run(export_project(project, str(tmpdir), include_images=True))
    assert compute.list_files.called

    with open(str(tmpdir / 'zipfile.zip'), 'wb') as f:
        for data in z:
            f.write(data)

    with zipfile.ZipFile(str(tmpdir / 'zipfile.zip')) as myzip:
        with myzip.open("vm-1/dynamips/test") as myfile:
            content = myfile.read()
            assert content == b"HELLO"

        with myzip.open("images/dynamips/test.image") as myfile:
            content = myfile.read()
            assert content == b"IMAGE"